Sealing joint device for indicator valve of medium-speed diesel engine

Abstract

The utility model relates to the field of diesel engines, in particular to a sealing joint device for an indicator valve of a medium-speed diesel engine. The sealing joint device for the indicator valve of the medium-speed diesel engine comprises a sealing joint and a combustion chamber, one end of the sealing joint is in threaded connection with an indicator valve assembly, the other end of the sealing joint is connected with a connecting rope, and an indicator valve gasket is arranged between the outer portion of a combustion chamber cylinder cover and the indicator valve assembly. The indicator valve assembly is fixedly connected with the combustion chamber through threads, a mounting plate is mounted on one side of the indicator valve assembly, and limiting teeth are mounted on one side of the mounting plate. According to the utility model, by designing a complicated sealing joint structure, including the threaded protective cap, the plug shaft, the curtain ring and the like, external dirt is effectively prevented from entering a connecting channel in the cylinder, the cleanliness in the measurement process is ensured, the sealing performance is improved, and gas leakage is avoided, so that the accuracy of measured data is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of diesel engine especially relates to a sealing joint device for medium speed diesel engine indicator valve. BACKGROUND

[0002] During the operation of the marine diesel engine, the working conditions of each cylinder need to be understood in real time; among them, the compression pressure and the maximum explosion pressure of each cylinder are important parameters for evaluating whether the diesel engine is running well, and need to be measured regularly during the test of the diesel engine; by measuring the compression pressure and the maximum explosion pressure of each cylinder, it can be determined whether the multi-cylinder diesel engine is working evenly, and the working state of each cylinder can be mastered, such as whether a certain cylinder is firing, whether the oil supply advance angle is reasonable, whether the oil supply amount is too large or too small, etc.; due to the large explosion pressure and high cylinder gas temperature, a system needs to be designed to connect the indicator with the cylinder when needed; during the operation of the diesel engine, there is a lot of carbon deposition in the cylinder, and the power unit may be bumped during maintenance due to the large size of the parts, so the cleanliness and sealing of the connection channel between the indicator and the cylinder need to be ensured, therefore, when designing the system, a dirt protection and thread protection device needs to be added, but the existing thread protection device will rotate during use after installation, causing the thread protection device to separate from the indicator, and thus failing to achieve the functions of dirt protection and protection.

[0003] Therefore, it is necessary to provide a new sealing joint device for medium speed diesel engine indicator valve to solve the above technical problems. SUMMARY

[0004] To solve the above technical problems, the utility model provides a sealing joint device for medium speed diesel engine indicator valve.

[0005] The sealing joint device for medium speed diesel engine indicator valve provided by the utility model comprises a sealing joint and a combustion chamber, one end of the sealing joint is threadedly connected with an indicator valve assembly, the other end of the sealing joint is connected with a connecting rope, a indicator valve gasket is arranged between the outside of the cylinder cover of the combustion chamber and the indicator valve assembly, the indicator valve assembly is fixedly connected with the combustion chamber through threads, an installation plate is installed on one side of the indicator valve assembly, and a limiting tooth is installed on one side of the installation plate.

[0006] Preferably, the sealing joint comprises a thread protection cap, a plug shaft and a tent ring, the top end of the indicator valve assembly is threadedly connected with the thread protection cap, the top end of the thread protection cap is rotatably connected with the plug shaft, and the tent ring is sleeved on the middle part of the plug shaft.

[0007] Preferably, the indicator valve assembly comprises an indicator valve, a cap, a positioning pin and a limiting ring, the top end of the combustion chamber is threadedly connected with the indicator valve, the top end of the indicator valve is installed with the cap, the middle part of the cap is installed with the positioning pin, and the limiting ring is sleeved on the middle part of the cap.

[0008] Preferably, one end of the connecting rope is connected to the tent loop, and the other end of the connecting rope is connected to the limiting ring.

[0009] Preferably, one side of the indicator valve is symmetrically fixedly connected with ear plates, and the two ear plates are rotatably connected to the mounting plate. One of the ear plates has a spring fixed inside, and one end of the spring is fixedly connected to a sliding plate. The sliding plate is slidably connected to the ear plate. A top rod is fixedly connected to the side of the sliding plate away from the spring. A square block is fixedly connected to the end of the top rod near the sliding plate. A square groove is opened at the bottom of the mounting plate. The square groove is slidably connected to the square block. By pressing the top rod and compressing the spring, when the square block moves into the ear plate, the mounting plate is no longer restricted and can rotate 90 degrees.

[0010] Preferably, a groove is provided on one side of the mounting plate, a threaded rod is rotatably connected to one side of the mounting plate, a threaded slider is threadedly connected to one end of the threaded rod, the threaded slider is slidably connected to the groove, and the threaded slider is slidably connected to the inside of the limiting tooth.

[0011] Preferably, the inner side of the mounting plate is designed in an arc shape, and the arc shape coincides with the axis of the threaded protective cap.

[0012] Compared with related technologies, the sealing joint device for the indicator valve of a medium-speed diesel engine provided by this utility model has the following advantages:

[0013] Enhanced sealing and anti-fouling function: The device effectively prevents external dirt from entering the cylinder connection channel through a complex sealing joint structure, including components such as threaded protective caps, plug shafts, and tent rings, ensuring the cleanliness of the measurement process. At the same time, it improves sealing performance, avoids gas leakage, and thus ensures the accuracy of measurement data.

[0014] Preventing accidental rotation: Even under external force or misoperation, such as accidental tool impact or improper maintenance, the mounting plate and its connected threaded protective caps cannot easily rotate due to the presence of the limiting teeth. This design effectively avoids seal failure or component loosening caused by rotation, ensuring the overall stability and safety of the system. Attached Figure Description

[0015] Figure 1 A schematic diagram of the sealing joint device for the indicator valve of a medium-speed diesel engine provided by this utility model;

[0016] Figure 2 for Figure 1 The diagram shows the structure of the back side;

[0017] Figure 3 for Figure 1 The diagram shows a partial cross-sectional view of the ear plate.

[0018] Figure 4 For Figure 1 The structural schematic view of the mounting plate is shown.

[0019] In the figure, 1 is a connecting rope; 2 is a sealing joint; 21 is a thread protection cap; 22 is a plug shaft; 23 is a tent ring; 3 is a indicator valve assembly; 31 is a indicator valve; 32 is a cap; 33 is a positioning pin; 34 is a limiting ring; 4 is a indicator valve gasket; 5 is a combustion chamber; 6 is a mounting plate; 7 is a limiting tooth; 41 is an ear plate; 42 is a spring; 43 is a sliding plate; 44 is a jacking rod; 45 is a square block; 46 is a square groove; 51 is a sliding groove; 52 is a threaded rod; 53 is a threaded sliding block. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.

[0021] The specific implementation of the utility model will be described in detail in combination with specific examples.

[0022] Please refer to Figures 1 to 4 A sealing joint device for a medium-speed diesel engine indicator valve, the sealing joint device for a medium-speed diesel engine indicator valve comprises a sealing joint 2 and a combustion chamber 5, one end of the sealing joint 2 is threadedly connected with a indicator valve assembly 3, the other end of the sealing joint 2 is connected with a connecting rope 1, a indicator valve gasket 4 is arranged between the outside of the cylinder cover of the combustion chamber 5 and the indicator valve assembly 3, the indicator valve assembly 3 is fixedly connected with the combustion chamber 5 through threads, a mounting plate 6 is installed on one side of the indicator valve assembly 3, a limiting tooth 7 is installed on one side of the mounting plate 6, the inner side of the mounting plate 6 is designed in a circular arc shape, and the circular arc shape is coincident with the axis of the thread protection cap 21.

[0023] Please refer to Figure 1 And Figure 2 The sealing joint 2 comprises a thread protection cap 21, a plug shaft 22 and a tent ring 23, the top end of the indicator valve assembly 3 is threadedly connected with the thread protection cap 21, the top end of the thread protection cap 21 is rotatably connected with the plug shaft 22, and the tent ring 23 is sleeved on the middle part of the plug shaft 22.

[0024] Please refer to Figures 2-3The indicator valve assembly 3 comprises an indicator valve 31, a cap 32, a positioning pin 33 and a limiting ring 34, the indicator valve 31 is threadedly connected to the top end of the combustion chamber 5, the cap 32 is installed at the top end of the indicator valve 31, the positioning pin 33 is installed in the middle of the cap 32, the limiting ring 34 is sleeved in the middle of the cap 32, one end of the connecting rope 1 is connected with the tent ring 23, and the other end of the connecting rope 1 is connected with the limiting ring 34.

[0025] Please refer to Figures 3-4 One side of the indicator valve 31 is symmetrically and fixedly connected with an ear plate 41, the ear plate 41 is rotatably connected with the mounting plate 6, one of the ear plates 41 is internally fixedly connected with a spring 42, one end of the spring 42 is fixedly connected with a sliding plate 43, the sliding plate 43 is slidably connected with the ear plate 41, the sliding plate 43 is fixedly connected with a top rod 44 at the side, away from the spring 42, one end of the top rod 44, close to the sliding plate 43, is fixedly connected with a square block 45, and the bottom end of the mounting plate 6 is provided with a square groove 46, the square groove 46 is slidably connected with the square block 45, by pressing the top rod 44, the spring 42 is compressed, when the square block 45 moves to the inside of the ear plate 41, the mounting plate 6 is not limited, and can be rotated by 90 degrees.

[0026] Please refer to Figure 4 One side of the mounting plate 6 is provided with a sliding groove 51, one side of the mounting plate 6 is rotatably connected with a threaded rod 52, one end of the threaded rod 52 is threadedly connected with a threaded sliding block 53, the threaded sliding block 53 is slidably connected with the sliding groove 51, and the threaded sliding block 53 is slidably connected with the limiting tooth 7.

[0027] The working principle of the sealing joint device for the indicator valve of the medium-speed diesel engine is as follows:

[0028] The system is connected with the cylinder space of each cylinder of the diesel engine by being connected with the cylinder cover, the compression pressure and the maximum explosion pressure in the cylinder during the working of the diesel engine are measured through the external indicator, the parameters of the diesel engine are adjusted according to the data, the explosion pressure curve is drawn, and the single-cylinder working condition is represented.

[0029] In use, the indicator valve assembly 3 is installed on the hole reserved for measuring the explosion pressure of the diesel engine and connected with the combustion chamber 5 in the cylinder through screwing, the sealing joint 2 is connected with the indicator valve assembly 3 through the screwing of the threaded protective cap 21 and the connecting rope 1, the indicator valve 31 is provided with the cap 32 at the open and close end, when the explosion pressure needs to be measured, the cap 32 is screwed to drive the indicator valve 31 to open through the positioning pin 33, at this time, the pressure in the indicator valve 31 is consistent with the real-time pressure in the cylinder, the threaded protective cap 21 is removed, and the indicator is connected through screwing at the place, so that the in-cylinder pressure monitoring of the diesel engine during operation is realized, when the threaded protective cap 21 needs to be removed, the top rod 44 is pressed first, and the spring 42 is compressed, when the square block 45 moves to the inside of the lug plate 41, the mounting plate 6 loses the limitation, and can be rotated by 90 degrees, at this time, the limiting tooth 7 is separated from the threaded protective cap 21, and the threaded protective cap 21 can be removed, when the threaded protective cap 21 is not rotated to be just coincided with the limiting tooth 7, the threaded rod 52 is only needed to be rotated to drive the threaded sliding block 53 to move, at this time, the limiting tooth 7 slides along the sliding groove 51, until the limiting tooth 7 is coincided with the edge of the threaded protective cap 21, and the limiting tooth 7 limits the rotation of the threaded protective cap 21.

[0030] The above is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made according to the content of the present application and the drawings, is also included in the patent protection range of the present application.

Claims

1. A sealed joint device for a indicator valve of a medium speed diesel engine, comprising: Sealing joint (2) and combustion chamber (5), characterized by: the sealing joint (2) one end is threadedly connected with the indicator valve assembly (3), the sealing joint (2) the other end is connected with connecting rope (1), the combustion chamber (5) cylinder cover outside and indicator valve assembly (3) between the setting has indicator valve gasket (4), the indicator valve assembly (3) and combustion chamber (5) are fixedly connected through thread, one side of the indicator valve assembly (3) is installed with mounting plate (6), one side of mounting plate (6) is installed with limit tooth (7).

2. The sealing joint device for a medium speed diesel indicator valve according to claim 1, characterized by The sealing joint (2) includes: thread protection cap (21), plug shaft (22), tent ring (23), the indicator valve assembly (3) top end is threadedly connected with thread protection cap (21), the thread protection cap (21) top end is rotatably connected with plug shaft (22), the plug shaft (22) middle part is sleeved with tent ring (23).

3. The medium speed diesel indicator valve seal joint device of claim 1, wherein The indicator valve assembly (3) includes: indicator valve (31), cap (32), positioning pin (33) and limit ring (34), the combustion chamber (5) top end is threadedly connected with indicator valve (31), the indicator valve (31) top end is installed with cap (32), the cap (32) middle part is installed with positioning pin (33), the cap (32) middle part is sleeved with limit ring (34).

4. The medium speed diesel indicator valve seal joint apparatus of claim 1, wherein, The connecting rope (1) one end is connected with tent ring (23), the connecting rope (1) the other end is connected with limit ring (34).

5. The medium speed diesel indicator valve seal joint apparatus of claim 1, wherein, One side of the indicator valve (31) is symmetrically fixedly connected with the ear plate (41), the two ear plates (41) are rotatably connected with the mounting plate (6), one of the ear plates (41) is fixedly connected with the spring (42) inside, one end of the spring (42) is fixedly connected with the sliding plate (43), the sliding plate (43) is slidably connected with the ear plate (41), one side of the sliding plate (43) away from the spring (42) is fixedly connected with the top rod (44), one end of the top rod (44) close to the sliding plate (43) is fixedly connected with the square block (45), the bottom end of the mounting plate (6) is provided with a square groove (46), the square groove (46) is slidably connected with the square block (45), by pressing the top rod (44), and the spring (42) is compressed, when the square block (45) moves to the inside of the ear plate (41), the mounting plate (6) loses the limit, that is, it can be rotated by 90 degrees.

6. The medium speed diesel indicator valve seal joint apparatus of claim 1, wherein, One side of the mounting plate (6) is provided with a sliding groove (51), one side of the mounting plate (6) is rotatably connected with a threaded rod (52), one end of the threaded rod (52) is threadedly connected with a threaded sliding block (53), the threaded sliding block (53) is slidably connected with the sliding groove (51), and the threaded sliding block (53) is slidably connected with the limit tooth (7) inside.

7. The medium speed diesel indicator valve seal joint apparatus of claim 1, wherein, The inner side of the mounting plate (6) is designed in a circular arc shape, and the circular arc shape coincides with the axis of the thread protection cap (21).

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