阅读说明：本技术 一种具有起动和测试的柴油机空气起动阀 (Diesel engine air starting valve with starting and testing functions ) 是由 刘艳斌 乔新勇 董意 李普 岳明彦 张小明 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种具有起动和测试功能的柴油机空气起动阀,包括：阀体,其内部具有容纳腔；阀组件,其设置在所述容纳腔内；套筒,其设置在所述阀体和所述阀组件之间；螺帽,其螺纹连接在所述阀体的一端；调整螺钉,其一端穿过所述螺帽后抵靠在所述套筒组件上；阀体压缩空气出气口,其开设在所述阀体上；阀体高压空气进气口,其开设在所述阀体上；套筒高压空气进气口,其开设在所述套筒上；套筒高压空气出气口,其开设在所述套筒上；其中,所述阀体进气口与所述套筒进气口选择性连通,所述阀体出气口与所述套筒出气口选择性连通。本发明通过设置在阀体内的套筒组件与阀组件的相互配合,能够实现空气起动功能与气缸压缩压力检测功能切换。(The invention discloses a diesel engine air starting valve with starting and testing functions, which comprises: a valve body having an accommodating chamber therein; a valve assembly disposed within the receiving cavity; a sleeve disposed between the valve body and the valve assembly; the nut is connected to one end of the valve body in a threaded mode; one end of the adjusting screw is abutted against the sleeve component after penetrating through the nut; the valve body compressed air outlet is formed in the valve body; the valve body high-pressure air inlet is formed in the valve body; the sleeve high-pressure air inlet is formed in the sleeve; the sleeve high-pressure air outlet is formed in the sleeve; the valve body air inlet is selectively communicated with the sleeve air inlet, and the valve body air outlet is selectively communicated with the sleeve air outlet. According to the invention, through the mutual matching of the sleeve component and the valve component arranged in the valve body, the switching between the air starting function and the cylinder compression pressure detection function can be realized.)

1. A diesel air starting valve with start and test, comprising:

a valve body having an accommodating chamber therein;

a valve assembly disposed within the receiving cavity;

a sleeve disposed between the valve body and the valve assembly;

the nut is sleeved at one end of the valve body;

one end of the adjusting screw is abutted against the sleeve component after penetrating through the nut;

the valve body compressed air outlet is formed in the valve body;

the valve body high-pressure air inlet is formed in the valve body and is positioned on one side of the compressed air outlet;

the sleeve high-pressure air inlet is formed in the sleeve;

the sleeve high-pressure air outlet is formed in the sleeve and is positioned on one side of the sleeve high-pressure air inlet;

the adjusting screw can move axially along the nut, so that the sleeve assembly and the valve assembly are pushed to move axially along the valve body, the valve body air inlet is selectively communicated with the sleeve air inlet, and the valve body air outlet is selectively communicated with the sleeve air outlet.

2. The air starting valve for a diesel engine having the functions of starting and testing as claimed in claim 1, wherein one end of said valve body is provided with an external thread.

3. The diesel air starter valve with start and test of claim 2, wherein:

further comprising:

at least two spacers, which are arranged on the inner wall of the valve body in the radial direction, close to the adjusting screw.

4. The diesel air starter valve with start and test of claim 3, further comprising:

one end of the air valve is provided with a lug;

characterized in that the valve assembly comprises:

and the air valve spring is arranged on the air valve, one end of the air valve spring is abutted against the partition plate, and the other end of the air valve spring is abutted against the bump.

5. The diesel air starter valve with start and test of claim 4 further comprising:

and the at least two longitudinal openings are axially arranged at one end of the sleeve and are matched with the partition plate.

6. The diesel air starter valve with start and test of claim 5, further comprising:

and one end of the sleeve spring is abutted against the valve body, and the other end of the sleeve spring is abutted against the end face of the other end of the sleeve.

7. The air primer valve for a diesel engine having the functions of priming and testing of claim 6, wherein said nut has a nut internal thread.

8. The diesel air starter valve with start and test of claim 7 wherein the adjustment screw comprises:

the adjusting screw is provided with a screw external thread and is arranged at the nut internal thread in a matching way;

and the adjusting end face is perpendicular to the screw rod.

Technical Field

The invention relates to a pneumatic valve, in particular to an air starting valve of a diesel engine with starting and testing functions.

Background

For heavy vehicles, an air starting method is generally adopted, and a high-pressure air bottle supplies high-pressure air to a cylinder to push a piston to move so as to drive a crankshaft of a diesel engine to rotate, so that starting is realized. The conventional air starting valve is only a one-way valve, high-pressure air enters the cylinder from the air bottle through the starting valve during starting, and when the diesel engine works normally, the starting valve is closed, and the cylinder is sealed and does not leak air.

As the diesel engine is used, due to factors such as abrasion and the like, the compression pressure in the cylinder dragging process is gradually reduced, and the technical condition evaluation and the residual service life prediction of the diesel engine can be carried out by detecting the air compression pressure of the cylinder. The conventional method requires disassembly of the air starting valve, installation of a pressure sensor at the starting valve, and detection of the cylinder compression pressure. The traditional method for detecting the compression pressure of the cylinder by disassembling the air valve has two problems:

1. in the back-dragging process of the diesel engine, the compressed air temperature is different due to different back-dragging rotating speeds and different ambient temperatures, and the compression pressure values detected when the diesel engine is in the same technical state are different. Therefore, detecting only the air compression pressure value will cause the technical state estimation and the residual life prediction to be misaligned, and the compressed air temperature must be detected at the same time to correct the compression pressure value.

2. Because the vehicle power compartment space is compact, the diesel engine air starting valve is difficult to disassemble and the pressure sensor is difficult to install on a real vehicle, so that the detection process of the compression pressure of the air cylinder is long in time consumption and needs to be operated by professional technicians.

Disclosure of Invention

The invention designs and develops an air starting valve of a diesel engine with starting and testing functions, and realizes the switching of an air starting function and a cylinder compression pressure detection function through the mutual matching of a sleeve component and a valve component which are arranged in a valve body, thereby realizing the purpose of quick and convenient detection.

The technical scheme provided by the invention is as follows:

a diesel air starting valve with start and test comprising:

a valve body having an accommodating chamber therein;

a valve assembly disposed within the receiving cavity;

a sleeve disposed between the valve body and the valve assembly;

the nut is sleeved at one end of the valve body;

one end of the adjusting screw is abutted against the sleeve component after penetrating through the nut;

the valve body compressed air outlet is formed in the valve body;

the valve body high-pressure air inlet is formed in the valve body and is positioned on one side of the compressed air outlet;

the sleeve high-pressure air inlet is formed in the sleeve;

the sleeve high-pressure air outlet is formed in the sleeve and is positioned on one side of the sleeve high-pressure air inlet;

the adjusting screw can move axially along the nut, so that the sleeve assembly and the valve assembly are pushed to move axially along the valve body, the valve body air inlet is selectively communicated with the sleeve air inlet, and the valve body air outlet is selectively communicated with the sleeve air outlet.

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

Preferably, the method further comprises the following steps:

at least two spacers, which are arranged on the inner wall of the valve body in the radial direction, close to the adjusting screw.

Preferably, the method further comprises the following steps:

one end of the air valve is provided with a lug;

characterized in that the valve assembly comprises:

and the air valve spring is arranged on the air valve, one end of the air valve spring is abutted against the partition plate, and the other end of the air valve spring is abutted against the bump.

Preferably, the method further comprises the following steps:

and the at least two longitudinal openings are axially arranged at one end of the sleeve and are matched with the partition plate.

Preferably, the method further comprises the following steps:

and one end of the sleeve spring is abutted against the valve body, and the other end of the sleeve spring is abutted against the end face of the other end of the sleeve.

Preferably, the nut has a nut internal thread.

Preferably, the adjustment screw includes:

the adjusting screw is provided with a screw external thread and is arranged at the nut internal thread in a matching way;

and the adjusting end face is perpendicular to the screw rod.

The invention has the following beneficial effects:

the air starting valve of the diesel engine with the starting and testing functions, provided by the invention, not only has the function of a one-way valve, but also is used for starting the diesel engine; meanwhile, the air starting valve is provided with a starting valve opening device and a high-pressure air outlet, and can be opened in the process of dragging the diesel engine backwards and forwards and guide high-pressure air to flow out of the air starting valve so as to detect the pressure and the temperature of the high-pressure air. Besides, the air starting valve does not need to be detached when the air cylinder compression pressure is detected by utilizing the air starting valve, and the switching between the air starting function and the air cylinder compression pressure detection function is realized through the built-in sleeve, so that the aim of quick and convenient detection is fulfilled.

Drawings

Fig. 1 is a schematic structural diagram of a valve body according to the present invention.

Fig. 2 is a schematic structural view of the valve body and valve assembly of the present invention.

Fig. 3 is a schematic structural view of a valve body and sleeve assembly according to the present invention.

FIG. 4 is a schematic representation of a high pressure air-started engine condition according to the present invention.

Fig. 5 shows a state of monitoring the temperature of the compressed air according to the present invention.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

As shown in fig. 1 to 5, the present invention provides a diesel engine air starting valve having a starting and testing function, comprising: the valve comprises a valve body 1, external threads 11, a valve body compressed air outlet 12, a valve body high-pressure air inlet 13, a valve component 2, an air valve 21, an air valve spring 22, a sleeve component 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 component 4, a nut 41 and an adjusting screw 42.

As shown in fig. 1 to 3, the diesel air starting valve includes: the valve comprises a valve body 1, a valve component 2, a sleeve component 3 and a nut component 4, wherein a containing cavity is arranged inside the valve body 1, an external thread 11 is arranged at one end of the valve body 1, a valve body compressed air outlet 12 and a valve body high-pressure air outlet 13 are sequentially arranged on the valve body 1 along the axial direction, the valve body high-pressure air outlet 13 is positioned at one side of the valve body compressed air outlet 12, the valve component 2 is arranged in the containing cavity of the valve body 1, the sleeve component 3 is arranged between the valve body 1 and the valve component 2, a sleeve high-pressure air inlet 311 and a sleeve high-pressure air outlet 312 are sequentially arranged on the sleeve component 3 along the axial direction, the nut 41 is provided with an internal thread and is arranged on the external thread 11 in a matching manner, one end of an adjusting screw 42 is abutted against one end of the sleeve component 3 after penetrating through the nut, the adjusting screw 42 can axially move along the nut 41, and further push the sleeve component 3 and the valve component 2 to axially move along the valve body 1, the valve body compressed air inlet 13 is selectively communicated with the sleeve high-pressure air inlet 311, and the valve body compressed air outlet 12 is selectively communicated with the sleeve high-pressure air outlet 312.

The valve body 1 includes: the air-conditioning valve comprises external threads 11, a valve body compressed air outlet 12, a valve body high-pressure air inlet 13 and partition plates 14, wherein at least two partition plates 1 are arranged on the inner wall of the valve body 1 along the radial direction, and the external threads are used for installing the valve body 1 to an air starting hole of a diesel engine. The valve body compressed air outlet is used for leading out compressed air in a cylinder in the process of dragging the diesel engine backwards to measure temperature and pressure, and the valve body high-pressure air inlet 13 is used for leading in high-pressure gas of a high-pressure air bottle, so that the high-pressure gas enters the cylinder to start the diesel engine.

The valve assembly 2 includes: the air valve 21 and the air valve spring 22 are arranged in the sleeve 31, one end of the air valve 21 is provided with a convex block, the sealing surface at the other end of the air valve 21 is matched with the sealing surface of the valve body 1, one end of the air valve spring 22 is supported against the convex block, the other end of the air valve spring 22 is supported against the partition plate 14 of the valve body, and the sealing surface of the air valve 21 is contacted with the sealing surface of the valve body 1 by the restoring force of the air valve spring 22 to cut off an air path.

The sleeve component 3 comprises a sleeve 31 and a sleeve spring 32, wherein the sleeve 31 is provided with a sleeve high-pressure air inlet 311 and a sleeve high-pressure air outlet 312 along the axial direction, the sleeve high-pressure air outlet 312 is positioned on one side of the sleeve high-pressure air inlet 311, one end of the sleeve 31 is provided with at least two longitudinal openings 313 along the axial direction, one end of the sleeve spring 32 is abutted to the valve body 1, the other end of the sleeve spring is abutted to the end face of the other end of the sleeve 31, the longitudinal openings 313 are matched with the partition plate 14, and the sleeve 31 can partially penetrate through the valve body partition plate 14 and move along the axial direction of the valve body.

In the present invention, it is preferable that the number of the partition 14 and the longitudinal opening 313 is two.

Nut assembly 4 includes nut 41 and adjusting screw 42, and adjusting screw 42 includes: the adjusting end face is vertically arranged at one end of the screw, the nut 41 is provided with a nut internal thread, a screw external thread is arranged on the screw and matched with the nut internal thread, and the adjusting screw 42 can move in the nut 41 along the axial direction.

As shown in fig. 4, when the adjusting screw 42 is in the initial position, the sleeve high-pressure air inlet 311 on the sleeve 31 is communicated with the valve body high-pressure air inlet 13, when the power system is started, high-pressure air enters the valve body 1, the air valve 21 is pushed open to enter the cylinder, and the engine is started; the position of the adjusting screw 42 in the nut 41 is changed to make the sleeve high-pressure air outlet 312 on the sleeve 31 communicate 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 a pressure and temperature sensor, as shown in fig. 5.

While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.