CN210141237U

CN210141237U - Exhaust mechanism

Info

Publication number: CN210141237U
Application number: CN201920996397.2U
Authority: CN
Inventors: 方良杰; 文李明; 张全富
Original assignee: China Shipbuilding Power Engineering Institute Co Ltd
Current assignee: China Shipbuilding Power Engineering Institute Co Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-03-13
Anticipated expiration: 2029-06-28

Abstract

The utility model relates to an engine assembly technical field specifically discloses an exhaust mechanism, including casing, case and elastic component. A first cavity, a second cavity, a third cavity and a fourth cavity which are sequentially communicated are arranged in the shell, the first cavity is used for being communicated with a low-pressure pipeline, the fourth cavity is used for being communicated with a high-pressure pipeline, the valve core is positioned in the third cavity in a sliding way, a damping hole is arranged on the valve core, the fourth cavity can be always communicated with the second cavity through the damping hole, the valve core is provided with a closing position which is abutted against the sealing surface and an opening position which is separated from the sealing surface, when the valve core is positioned at the closed position, the valve core is abutted with the sealing surface and separates the first cavity from the second cavity, when the valve core is positioned at the opening position, the valve core is separated from the sealing surface, the first cavity is communicated with the second cavity, the elastic part always has the tendency of driving the valve core to move towards the opening position, after hydraulic oil in the high-pressure pipeline passes through the damping hole, the pressure at two ends of the valve core is unequal, and the valve core can be driven to move from the opening position to the closing position, so that automatic exhaust and oil sealing are realized.

Description

Exhaust mechanism

Technical Field

The utility model relates to an engine assembly technical field especially relates to an exhaust mechanism.

Background

The normal operation of a hydraulic system cannot be kept during the operation of the diesel engine, and all hydraulic pipelines and oil passages of a main machine are generally required to be flushed before the diesel engine operates. The purpose of the flushing is, on the one hand, to carry away possible remaining impurities and, on the other hand, to discharge the air in the line. However, the hydraulic system of the diesel engine is quite complex, before the motor car is flushed after the diesel engine is finished, fuel oil, lubricating oil or servo oil cannot be effectively circulated and air is discharged due to the blocking effect of a piston or a valve in a part of pipelines and oil paths, so that a large amount of air filled in a cavity cannot be effectively discharged, related hydraulic components cannot normally work after being driven for a long time, at the moment, operators are required to deflate key positions (such as pipelines connected with the piston or the valve) of the hydraulic system, and during operation, the operators are required to manually open the deflation screws through tools, so that the efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the utility model provides an exhaust mechanism to when solving among the prior art diesel engine spare vehicle, need operating personnel to open the gassing screw through the instrument and deflate hydraulic system's pipeline, oil circuit manually, the problem that the operating efficiency is low.

In one aspect, the utility model provides an exhaust mechanism, this exhaust mechanism includes:

the pipeline sealing device comprises a shell, wherein a first cavity, a second cavity, a third cavity and a fourth cavity which are sequentially communicated are arranged in the shell, the inner diameter of the first cavity and the inner diameter of the third cavity are both smaller than that of the second cavity, the inner diameter of the fourth cavity is smaller than that of the third cavity, the inner wall of the second cavity is connected with the inner wall of the first cavity through a sealing surface, the first cavity is used for being communicated with a low-pressure pipeline, and the fourth cavity is used for being communicated with a high-pressure pipeline;

the valve core is slidably positioned in the third cavity, the outer surface of the valve core is matched with the inner surface of the third cavity, a damping hole is formed in the valve core, the fourth cavity can be communicated with the second cavity all the time through the damping hole, the valve core is provided with a closing position abutted against the sealing surface and an opening position separated from the sealing surface, when the valve core is positioned in the closing position, the valve core is abutted against the sealing surface and separates the first cavity from the second cavity, and when the valve core is positioned in the opening position, the valve core is separated from the sealing surface and the first cavity is communicated with the second cavity;

the elastic piece always has the tendency of driving the valve core to move to the opening position, and hydraulic oil in the high-pressure pipeline can drive the valve core to move from the opening position to the closing position after passing through the damping hole.

Preferably, the valve core is provided with a blind hole extending along the axial direction of the valve core, the blind hole can be always communicated with the fourth cavity, the damping hole is arranged on the side wall of the valve core, and the damping hole is communicated with the blind hole.

Preferably, the valve core comprises a first end and a second end along the axial direction of the valve core, the first end is provided with a matching surface, and when the valve core is located at the closed position, the matching surface is abutted to the sealing surface and separates the first cavity from the second cavity;

the inner wall of the third cavity is connected with the inner wall of the fourth cavity through a step surface, and when the valve core is located at the opening position, the second end is abutted to the step surface.

Preferably, the sealing surface is a conical surface, a large end of the conical surface is connected with the cavity wall of the second cavity, a small end of the conical surface is connected with the cavity wall of the first cavity, the matching surface is matched with the sealing surface, and when the valve core is located at the closed position, the matching surface is attached to the sealing surface.

Preferably, the sealing surface is a conical surface, a large end of the conical surface is connected with the cavity wall of the second cavity, a small end of the conical surface is connected with the cavity wall of the first cavity, the matching surface is a spherical surface, and when the valve core is located at the closed position, the matching surface is in line contact with the sealing surface.

Preferably, an elastic layer is arranged on the outer surface of the first end, and the matching surface is the outer surface of the elastic layer.

Preferably, the elastic part is a pressure spring, the first cavity comprises a cavity A and a cavity B, the aperture of the cavity A is smaller than that of the cavity B, the cavity A is used for being communicated with a low-pressure pipeline, the cavity B is communicated with the second cavity, the cavity wall of the cavity B is connected with the cavity wall of the cavity A through a supporting surface, one end of the pressure spring abuts against the supporting surface, and the other end of the pressure spring abuts against the first end.

Preferably, the first end is provided with a boss, and the boss is sleeved with the pressure spring.

Preferably, the shell comprises a shell body and a base, the first cavity, the second cavity and the third cavity are all arranged in the shell body, the fourth cavity is arranged in the base, and the shell body is detachably connected with the base.

Preferably, the outer end of the base is provided with a straight groove or a cross groove.

The utility model has the advantages that:

the utility model provides an exhaust mechanism, this exhaust mechanism include casing, case and elastic component. The casing is internally provided with a first cavity, a second cavity, a third cavity and a fourth cavity which are sequentially communicated, the inner diameter of the first cavity and the inner diameter of the third cavity are smaller than the inner diameter of the second cavity, the inner diameter of the fourth cavity is smaller than the inner diameter of the third cavity, the inner wall of the second cavity is connected with the inner wall of the first cavity through a sealing surface, the first cavity is communicated with a low-pressure pipeline, and the fourth cavity is communicated with a high-pressure pipeline. The valve core is located in the third cavity in a sliding mode, the outer surface of the valve core is matched with the inner surface of the third cavity, a damping hole is formed in the valve core, the fourth cavity can be communicated with the second cavity all the time through the damping hole, the valve core is provided with a closing position abutted to the sealing surface and an opening position separated from the sealing surface, when the valve core is located at the closing position, the valve core is abutted to the sealing surface and separates the first cavity from the second cavity, and when the valve core is located at the opening position, the valve core is separated from the sealing surface and the first cavity is communicated with the. The elastic part always has the trend of driving the valve core to move to the open position, and hydraulic oil in the high-pressure pipeline can drive the valve core to move from the open position to the closed position after passing through the damping hole. When compressed air exists in the high-pressure pipeline, the air can directly enter the second cavity from the high-pressure pipeline through the fourth cavity and the damping hole due to low viscosity of the air, so that air pressure at two ends of the valve core in the axial direction is balanced, the valve core moves to an opening position under the elastic action of the elastic piece, the first cavity is communicated with the second cavity, and the air can be directly discharged into the low-pressure pipeline through the first cavity. When hydraulic oil passes through the damping hole, differential pressure is generated at two ends of the damping hole by the hydraulic oil, the pressure of the hydraulic oil entering the second cavity is lower than that of the hydraulic oil in the fourth cavity, and the valve core is pushed to move from the opening position to the closing position, so that the valve core compresses the elastic piece and is abutted against the sealing surface to separate the first cavity from the second cavity and prevent the hydraulic oil from entering the low-pressure pipeline.

Drawings

Fig. 1 is a first schematic structural diagram of an exhaust mechanism in an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the exhaust mechanism of FIG. 1 taken along the direction A-A;

FIG. 3 is an exploded view of an exhaust mechanism according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an exhaust mechanism according to an embodiment of the present invention.

In the figure:

1. a housing;

11. a housing body; 111. a first chamber; 1111. a cavity B; 1112. a cavity A; 112. a second chamber; 113. a third chamber; 114. a sealing surface;

12. a base; 121. a fourth chamber; 122. a step surface; 123. a straight slot;

2. a valve core; 21. blind holes; 22. a damping hole; 23. a mating surface; 24. a boss;

3. an elastic member.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 to 4, the present embodiment provides an exhaust mechanism, which includes a housing 1, a valve element 2, and an elastic member. Be equipped with the first chamber 111, the second chamber 112, third chamber 113 and the fourth chamber 121 that communicate in proper order in the casing 1, the internal diameter of first chamber 111 and the internal diameter of third chamber 113 all are less than the internal diameter of second chamber 112, the internal diameter of fourth chamber 121 is less than the internal diameter of third chamber 113, the inner wall of second chamber 112 passes through sealed face 114 with the inner wall of first chamber 111 to be connected, first chamber 111 is used for and low-pressure pipeline intercommunication, fourth chamber 121 is used for and high-pressure pipeline intercommunication. The valve core 2 is located in the third cavity 113 in a sliding mode, the outer surface of the valve core 2 is matched with the inner surface of the third cavity 113, the valve core 2 is provided with a damping hole 22, the fourth cavity 121 can be communicated with the second cavity 112 all the time through the damping hole 22, the valve core 2 is provided with a closing position abutted to the sealing surface 114 and an opening position separated from the sealing surface 114, when the valve core 2 is located at the closing position, the valve core 2 is abutted to the sealing surface 114 and separates the first cavity 111 from the second cavity 112, and when the valve core 2 is located at the opening position, the valve core 2 is separated from the sealing surface 114 and the first cavity 111 is communicated with the second cavity. The elastic part always has the tendency of driving the valve core 2 to move to the opening position, and hydraulic oil in the high-pressure pipeline can drive the valve core 2 to move from the opening position to the closing position after passing through the damping hole 22.

When compressed air exists in the high-pressure pipeline, the air can directly enter the second cavity 112 from the high-pressure pipeline through the fourth cavity 121 and the damping hole 22 due to low viscosity of the air, so that air pressure at two ends of the valve core 2 in the axial direction is balanced, the valve core 2 moves to the opening position under the elastic action of the elastic piece, the first cavity 111 is communicated with the second cavity 112, and the air can be directly discharged into the low-pressure pipeline through the first cavity 111, so that automatic air exhaust is realized. When the hydraulic oil passes through the orifice 22, a pressure difference is generated between two ends of the orifice 22, the pressure of the hydraulic oil entering the second chamber 112 is lower than that of the hydraulic oil in the fourth chamber 121, and the valve element 2 is pushed to move from the open position to the closed position, so that the valve element 2 compresses the elastic member and abuts against the sealing surface 114 to separate the first chamber 111 and the second chamber 112, the hydraulic oil is prevented from entering the low-pressure pipeline, and the exhaust mechanism can be automatically closed after air is exhausted, and oil leakage is prevented.

In this embodiment, the valve core 2 includes a first end and a second end along the axial direction of the valve core 2, when the valve core 2 moves between the open position and the closed position, the second end is always located in the third cavity 113, and the first end is always located in the second cavity 112, that is, the first end of the valve core 2 extends out of the third cavity 113, and during the reciprocating motion of the valve core 2, the first end extends out of the third cavity 113. It will be appreciated that the opening in the spool 2 through which the orifice 22 communicates with the second chamber 112 is also provided at the first end.

Alternatively, the valve core 2 is provided with a blind hole 21 extending along the axial direction of the valve core 2, the blind hole 21 can be always communicated with the fourth cavity 121, the damping hole 22 is provided on the side wall of the valve core 2, and the damping hole 22 is communicated with the blind hole 21. In this embodiment, the open end of the blind bore 21 is disposed at the second end of the valve core 2, so that during the reciprocating motion of the valve core 2, the blind bore 21 communicates with the third chamber 113 and indirectly communicates with the fourth chamber 121.

Optionally, the first end is provided with a mating surface 23, and when the valve core 2 is in the closed position, the mating surface 23 abuts against the sealing surface 114 and separates the first cavity 111 and the second cavity 112; the inner wall of the third chamber 113 and the inner wall of the fourth chamber 121 are connected by a step surface 122, and the second end abuts against the step surface 122 when the spool 2 is in the open position. In this embodiment, the sealing surface 114 is a conical surface, a large end of the conical surface is connected to the cavity wall of the second cavity 112, a small end of the conical surface is connected to the cavity wall of the first cavity 111, the mating surface 23 is matched with the sealing surface 114, and when the valve element 2 is located at the closed position, the mating surface 23 is attached to the sealing surface 114. In other embodiments, the sealing surface 114 is a conical surface, but the mating surface 23 is a spherical surface, and when the valve element 2 is in the closed position, the mating surface 23 is in line contact with the sealing surface 114, but it is also possible to make the sealing surface 114 spherical, and the mating surface 23 conical or flat, etc. Preferably, the outer surface of the first end is provided with an elastic layer, and the mating surface 23 is the outer surface of the elastic layer. By the resilient layer abutting against the sealing surface 114, a sealing effect between the first chamber 111 and the second chamber 112 can be ensured.

Optionally, the elastic member is a pressure spring, the first cavity 111 includes an a cavity 1112 and a B cavity 1111, an aperture of the a cavity 1112 is smaller than an aperture of the B cavity 1111, the a cavity 1112 is used for communicating with a low-pressure pipeline, the B cavity 1111 is communicated with the second cavity 112, a cavity wall of the B cavity 1111 is connected with a cavity wall of the a cavity 1112 through a supporting surface, one end of the pressure spring abuts against the supporting surface, and the other end of the pressure spring abuts against the first end. In other embodiments, the elastic member may be a gas spring or the like.

Optionally, the first end is provided with a boss 24, the compression spring is sleeved on the boss 24, and the spring can be prevented from being skewed in the process of extending the compressor by the boss 24.

Optionally, the housing 1 includes a housing body 11 and a base 12, the first cavity 111, the second cavity 112, and the third cavity 113 are all disposed on the housing body 11, the fourth cavity 121 is disposed on the base 12, and the housing body 11 is detachably connected to the base 12. By detachably connecting the housing body 11 and the base 12, it is convenient to install the valve cartridge 2 and the elastic member inside and to perform maintenance thereof. In this embodiment, the housing body 11 and the base 12 are detachably connected through a screw, and in other embodiments, the housing body 11 and the base 12 may also be detachably connected through a flange or a bolt. Preferably, the stepped surface 122 is formed by a surface of the base 12 close to one end of the valve core 2, so that the position of the stepped surface 122 can be effectively adjusted by adjusting the screwing depth of the base 12, and the adjustment of the opening position of the pressure spring is realized.

Optionally, the outer end of the base 12 is provided with a straight groove 123 or a cross groove. The base 12 can be conveniently disassembled and assembled by a straight screwdriver or a cross screwdriver. In order to facilitate the disassembly and assembly, one end of the shell body 11 far away from the base 12 is provided with a structure with a hexagonal normal section, so that the clamping is facilitated.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An exhaust mechanism, comprising:

the pipeline sealing device comprises a shell (1), wherein a first cavity (111), a second cavity (112), a third cavity (113) and a fourth cavity (121) which are sequentially communicated are arranged in the shell (1), the inner diameter of the first cavity (111) and the inner diameter of the third cavity (113) are both smaller than the inner diameter of the second cavity (112), the inner diameter of the fourth cavity (121) is smaller than the inner diameter of the third cavity (113), the inner wall of the second cavity (112) is connected with the inner wall of the first cavity (111) through a sealing surface (114), the first cavity (111) is communicated with a low-pressure pipeline, and the fourth cavity (121) is communicated with a high-pressure pipeline;

the valve core (2) is slidably positioned in the third cavity (113), the outer surface of the valve core (2) is matched with the inner surface of the third cavity (113), a damping hole (22) is arranged on the valve core (2), the fourth cavity (121) can be always communicated with the second cavity (112) through the damping hole (22), the valve element (2) having a closed position abutting the sealing surface (114) and an open position spaced from the sealing surface (114), when the valve element (2) is in the closed position, the valve element (2) abuts the sealing surface (114) and separates the first chamber (111) and the second chamber (112), when the valve element (2) is in the open position, the valve element (2) is separated from the sealing surface (114) and the first cavity (111) is communicated with the second cavity (112);

the elastic piece always has the tendency of driving the valve core (2) to move to the opening position, and hydraulic oil in the high-pressure pipeline can drive the valve core (2) to move from the opening position to the closing position after passing through the damping hole (22).

2. The exhaust mechanism according to claim 1, wherein the spool (2) is provided with a blind hole (21) extending in the axial direction of the spool (2), the blind hole (21) is always communicable with the fourth chamber (121), the orifice (22) is provided on the side wall of the spool (2), and the orifice (22) is communicable with the blind hole (21).

3. The venting mechanism according to claim 1, wherein the valve element (2) comprises a first end and a second end in the axial direction of the valve element (2), the first end being provided with a mating surface (23), the mating surface (23) abutting the sealing surface (114) and separating the first chamber (111) and the second chamber (112) when the valve element (2) is in the closed position;

the inner wall of the third cavity (113) is connected with the inner wall of the fourth cavity (121) through a step surface (122), and when the valve core (2) is located at the opening position, the second end is abutted to the step surface (122).

4. The venting mechanism as recited in claim 3, characterized in that the sealing surface (114) is a conical surface, a large end of the conical surface is connected with the wall of the second chamber (112), a small end of the conical surface is connected with the wall of the first chamber (111), the mating surface (23) is matched with the sealing surface (114), and the mating surface (23) is abutted with the sealing surface (114) when the valve element (2) is located at the closed position.

5. The venting mechanism according to claim 3, wherein the sealing surface (114) is a conical surface, a large end of the conical surface is connected with the wall of the second chamber (112), a small end of the conical surface is connected with the wall of the first chamber (111), and the mating surface (23) is a spherical surface, and the mating surface (23) is in line contact with the sealing surface (114) when the valve element (2) is in the closed position.

6. A vent mechanism according to claim 4 or 5, wherein an outer surface of the first end is provided with an elastic layer, and the mating surface (23) is an outer surface of the elastic layer.

7. The exhaust mechanism according to claim 3, characterized in that the elastic member is a compression spring, the first chamber (111) comprises an A chamber (1112) and a B chamber (1111), the aperture of the A chamber (1112) is smaller than that of the B chamber (1111), the A chamber (1112) is used for communicating with a low-pressure pipeline, the B chamber (1111) is communicated with the second chamber (112), the chamber wall of the B chamber (1111) and the chamber wall of the A chamber (1112) are connected through a supporting surface, one end of the compression spring abuts against the supporting surface, and the other end of the compression spring abuts against the first end.

8. The exhaust mechanism as claimed in claim 7, wherein the first end is provided with a boss (24), and the compression spring is sleeved on the boss (24).

9. The exhaust mechanism according to claim 1, wherein the housing (1) comprises a housing body (11) and a base (12), the first chamber (111), the second chamber (112) and the third chamber (113) are all disposed in the housing body (11), the fourth chamber (121) is disposed in the base (12), and the housing body (11) is detachably connected to the base (12).

10. Exhaust mechanism according to claim 9, characterized in that the outer end of the base (12) is provided with a straight groove (123) or a cross groove.