A diesel engine air starting valve with starting and testing functions

Abstract

The present invention discloses a diesel engine air starting valve with starting and testing functions, comprising: a valve body, which has an accommodating cavity inside; a valve assembly, which is arranged in the accommodating cavity; a sleeve, which is arranged between the valve body and the valve assembly; a nut, which is threadedly connected to one end of the valve body; an adjusting screw, one end of which passes through the nut and abuts against the sleeve assembly; a valve body compressed air outlet, which is opened on the valve body; a valve body high-pressure air inlet, which is opened on the valve body; a sleeve high-pressure air inlet, which is opened on the sleeve; a sleeve high-pressure air outlet, which is opened on the sleeve; wherein the valve body inlet is selectively connected to the sleeve inlet, and the valve body outlet is selectively connected to the sleeve outlet. The present invention can realize the switching between the air starting function and the cylinder compression pressure detection function through the mutual cooperation of the sleeve assembly and the valve assembly arranged in the valve body.

Description

Technical Field

[0001] The invention relates to a pneumatic valve, in particular to a diesel engine air starting valve with starting and testing functions. Background Art

[0002] For heavy vehicles, the air starting method is usually adopted, where the high-pressure air bottle provides high-pressure air to the cylinder, pushing the piston to move and thus driving the diesel engine crankshaft to rotate to achieve starting. The conventional air starting valve is only a one-way valve. When starting, the high-pressure air enters the cylinder from the air bottle through the starting valve. When the diesel engine is working normally, the starting valve is closed and the cylinder is sealed and leak-proof.

[0003] As the diesel engine is used, due to factors such as wear, the compression pressure of the cylinder will gradually decrease during the reverse drag process. By detecting the cylinder air compression pressure, the technical condition of the diesel engine can be evaluated and the remaining service life can be predicted. The conventional method requires disassembling the air starter valve, installing a pressure sensor at the starter valve, and detecting the cylinder compression pressure. The traditional method of disassembling the air valve to detect the cylinder compression pressure has two problems:

[0004] 1. During the reverse towing process of the diesel engine, the compressed air temperature is different due to the different reverse towing speeds and ambient temperatures, and the compression pressure values ​​detected when the diesel engine is in the same technical state are different. Therefore, only detecting the air compression pressure value will lead to inaccurate technical status assessment and remaining life prediction. The compressed air temperature must be detected at the same time to correct the compression pressure value.

[0005] 2. Due to the compact space in the vehicle power compartment, it is difficult to remove the diesel engine air starting valve and install the pressure sensor on the actual vehicle, resulting in a long cylinder compression pressure detection process and requiring professional technicians to operate. Summary of the invention

[0006] The present invention designs and develops a diesel engine air starting valve with starting and testing functions. Through the cooperation of a sleeve assembly and a valve assembly arranged in a valve body, the air starting function and the cylinder compression pressure detection function are switched, thereby achieving the purpose of fast and convenient detection.

[0007] The technical solution provided by the present invention is:

[0008] A diesel engine air starting valve with starting and testing function, comprising:

[0009] A valve body having an accommodating cavity therein;

[0010] A valve assembly, which is arranged in the accommodating chamber;

[0011] a sleeve disposed between the valve body and the valve assembly;

[0012] A nut, which is sleeved on one end of the valve body;

[0013] An adjusting screw, one end of which passes through the nut and abuts against the sleeve assembly;

[0014] A valve body compressed air outlet, which is disposed on the valve body;

[0015] A valve body high pressure air inlet, which is provided on the valve body and is located on one side of the compressed air outlet;

[0016] A sleeve high-pressure air inlet, which is provided on the sleeve;

[0017] A sleeve high-pressure air outlet, which is provided on the sleeve and is located on one side of the sleeve high-pressure air inlet;

[0018] Wherein, the adjusting screw can move axially along the nut, thereby pushing the sleeve assembly and the valve assembly to move axially along the valve body, so that the valve body air inlet is selectively connected with the sleeve air inlet, and the valve body air outlet is selectively connected with the sleeve air outlet.

[0019] Preferably, one end of the valve body is provided with an external thread.

[0020] Preferably, it also includes:

[0021] At least two partitions are radially arranged on the inner wall of the valve body and close to the adjusting screw.

[0022] Preferably, it also includes:

[0023] An air valve, one end of which is provided with a projection;

[0024] Characteristically, the valve assembly comprises:

[0025] An air valve spring is arranged on the air valve, one end of the air valve spring abuts against the partition plate, and the other end abuts against the protrusion.

[0026] Preferably, it also includes:

[0027] At least two longitudinal openings are axially opened at one end of the sleeve and matched with the partition.

[0028] Preferably, it also includes:

[0029] A sleeve spring has one end abutting against the valve body and the other end abutting against the end surface of the other end of the sleeve.

[0030] Preferably, the nut has an internal nut thread.

[0031] Preferably, the adjusting screw comprises:

[0032] An adjusting screw having an external screw thread and being matched and arranged at the internal thread of the nut;

[0033] The end face is adjusted so as to be arranged perpendicularly to the screw rod.

[0034] The beneficial effects of the present invention are:

[0035] The diesel engine air starting valve with starting and testing functions provided by the present invention not only has the function of a one-way valve for starting the diesel engine, but also has a starting valve opening device and a high-pressure air outlet, which can open the air starting valve during the reverse towing of the diesel engine and guide the high-pressure air to flow out of the air starting valve to perform high-pressure air pressure temperature detection. In addition, when using the air starting valve proposed by the present invention, it is not necessary to remove the air starting valve when detecting the cylinder compression pressure. The air starting function and the cylinder compression pressure detection function can be switched through the built-in sleeve, thereby achieving the purpose of fast and convenient detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic structural diagram of the valve body described in the present invention.

[0037] Figure 2 It is a schematic structural diagram of the valve body and valve assembly described in the present invention.

[0038] Figure 3 It is a schematic structural diagram of the valve body and sleeve assembly described in the present invention.

[0039] Figure 4 This is a schematic diagram of the state of the high-pressure air starting engine according to the present invention.

[0040] Figure 5 This is the compressed air temperature monitoring state described in the present invention. DETAILED DESCRIPTION

[0041] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0042] like Figure 1-5 As shown, the present invention provides a diesel engine air starting valve with starting and testing functions, including: a valve body 1, an external thread 11, a valve body compressed air outlet 12, a valve body high-pressure air inlet 13, a valve assembly 2, an air valve 21, an air valve spring 22, a sleeve assembly 3, a sleeve 31, a sleeve spring 32, a sleeve high-pressure air inlet 311, a sleeve high-pressure air outlet 312, a longitudinal opening, a nut assembly 4, a nut 41, and an adjusting screw 42.

[0043] like Figure 1-3As shown, the diesel engine air starting valve comprises: a valve body 1, a valve assembly 2, a sleeve assembly 3 and a nut assembly 4. The valve body 1 has an accommodating cavity inside, one end of the valve body 1 has an external thread 11, and the valve body 1 is provided with a valve body compressed air outlet 12 and a valve body high-pressure air outlet 13 in sequence along the axial direction. The valve body high-pressure air outlet 13 is located on one side of the valve body compressed air outlet 12. The valve assembly 2 is arranged in the accommodating cavity of the valve body 1, the sleeve assembly 3 is arranged between the valve body 1 and the valve assembly 2, and the sleeves 3 are provided in sequence along the axial direction. The high-pressure air inlet 311 and the sleeve high-pressure air outlet 312, the nut 41 has an internal thread and is matched on the external thread 11, one end of the adjusting screw 42 passes through the nut and abuts against one end of the sleeve assembly 3, the adjusting screw 42 can move axially along the nut 41, and then push the sleeve assembly 3 and the valve assembly 2 to move axially along the valve body 1, so that the valve body compressed air inlet 13 is selectively connected with the sleeve high-pressure air inlet 311, and the valve body compressed air outlet 12 is selectively connected with the sleeve high-pressure air outlet 312.

[0044] The valve body 1 includes: an external thread 11, a valve body compressed air outlet 12, a valve body high-pressure air inlet 13, and a partition 14. At least two partitions 1 are arranged radially on the inner wall of the valve body 1. The external thread is used to install the valve body 1 to the air starting hole of the diesel engine. The valve body compressed air outlet is used to export the compressed air in the cylinder during the reverse towing process of the diesel engine to measure the temperature and pressure. The valve body high-pressure air inlet 13 is used to introduce the high-pressure gas of the high-pressure air bottle, so that the high-pressure gas enters the cylinder to start the diesel engine.

[0045] The valve assembly 2 includes: an air valve 21 and an air valve spring 22. The air valve 21 is arranged in a sleeve 31, and a protrusion is arranged at one end. The sealing surface of the other end cooperates with the sealing surface of the valve body 1. One end of the air valve spring 22 is supported on the protrusion, and the other end is supported on the partition 14 of the valve body. The sealing surface of the air valve 21 contacts the sealing surface of the valve body 1 by relying on the restoring force of the air valve spring 22, thereby isolating the air path.

[0046] The sleeve assembly 3 includes a sleeve 31 and a sleeve spring 32. A sleeve high-pressure air inlet 311 and a sleeve high-pressure air outlet 312 are axially arranged in sequence on the sleeve 31. The sleeve high-pressure air outlet 312 is located on one side of the sleeve high-pressure air inlet 311. At least two longitudinal openings 313 are axially arranged at one end of the sleeve 31. One end of the sleeve spring 32 is supported on the valve body 1, and the other end is supported on the end face of the other end of the sleeve 31. The longitudinal opening 313 is matched with the partition 14, so that the sleeve 31 can partially pass through the valve body partition 14 and move axially along the valve body.

[0047] In the present invention, as a preferred embodiment, the number of the partition 14 and the number of the longitudinal opening 313 are both two.

[0048] The nut assembly 4 includes a nut 41 and an adjusting screw 42. The adjusting screw 42 includes: a screw rod and an adjusting end face. The adjusting end face is vertically arranged at one end of the screw rod. The nut 41 is provided with an internal nut thread. The screw rod is provided with an external screw thread, which is matched with the internal nut thread so that the adjusting screw 42 can move axially inside the nut 41.

[0049] like Figure 4 As shown, when in use, when the adjusting screw 42 is in the initial position, the sleeve high-pressure air inlet 311 on the sleeve 31 is connected with the valve body high-pressure air inlet 13. When the power system is started, high-pressure air enters the valve body 1, pushes open the air valve 21 and enters the cylinder to start the engine; the position of the adjusting screw 42 in the nut 41 is changed, so that the sleeve high-pressure air outlet 312 on the sleeve 31 is connected with the valve body compressed air outlet 12, and at the same time, the sealing surface of the air valve 21 is separated from the sealing surface of the valve body 1, and the compressed air in the cylinder flows out of the valve body 1 through the sleeve high-pressure air outlet 312 and the valve body compressed air outlet 12. At this time, the pressure and temperature of the compressed air can be detected by the pressure and temperature sensor, as shown in FIG. Figure 5 shown.

[0050] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A diesel engine air starting valve with starting and testing function, characterized in that: include: A valve body having an accommodating cavity therein; A valve assembly, which is arranged in the accommodating chamber; a sleeve disposed between the valve body and the valve assembly; A nut, which is sleeved on one end of the valve body; An adjusting screw, one end of which passes through the nut and abuts against the sleeve, the adjusting screw comprising: an adjusting screw having an external screw thread and matched with the internal screw thread of the nut; an adjusting end face, the adjusting end face being perpendicularly arranged to the screw; A valve body compressed air outlet, which is disposed on the valve body; A valve body high pressure air inlet, which is provided on the valve body and is located on one side of the compressed air outlet; A sleeve high-pressure air inlet, which is provided on the sleeve; A sleeve compressed air outlet, which is provided on the sleeve and is located on one side of the sleeve high-pressure air inlet; at least two baffles, which are radially arranged on the inner wall of the valve body; An air valve, one end of which is provided with a projection; The valve assembly comprises: An air valve spring, which is sleeved on the air valve, one end of the air valve spring abuts against the partition plate, and the other end abuts against the protrusion; At least two longitudinal openings are axially opened at one end of the sleeve and matched with the partition plate so that the sleeve can partially pass through the valve body partition plate and move axially along the valve body; A sleeve spring, the sleeve spring is sleeved on the air valve, one end of the sleeve spring abuts against the valve body, and the other end abuts against the end surface of the other end of the sleeve; wherein the adjusting screw can move axially along the nut, thereby pushing the sleeve and the valve assembly to move axially along the valve body, so that the high-pressure air inlet of the valve body is selectively connected with the high-pressure air inlet of the sleeve, and the compressed air outlet of the valve body is selectively connected with the compressed air outlet of the sleeve; During use, when the adjusting screw is in the initial position, the sleeve high-pressure air inlet on the sleeve is connected with the high-pressure air inlet of the valve body. When the diesel engine power system starts, high-pressure air enters the valve body, pushes open the air valve and enters the cylinder to start the engine; the position of the adjusting screw in the nut is changed so that the sleeve compressed air outlet on the sleeve is connected with the compressed air outlet of the valve body, and at the same time, the sealing surface of the air valve is separated from the sealing surface of the valve body, and the compressed air in the cylinder flows out of the valve body through the sleeve compressed air outlet and the valve body compressed air outlet. At this time, the pressure and temperature of the compressed air are detected by the pressure and temperature sensor.

2. The diesel engine air starting valve with starting and testing function according to claim 1, characterized in that: One end of the valve body is provided with an external thread.

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